Reticulation caused by swelling with aqueous solutions is reduced for elements containing at least two contiguous gelatin-containing layers wherein the uppermost layer has a lateral swell coefficient at least 10 % greater than the lower gelatin-containing layer by adding to the uppermost layer 1 - 90 % by weight of a water-soluble, non-diffusible vinyl polymer having (a) reactive groups which crosslink the polymer and gelatin, or (b) amine groups, the uppermost layer also containing a gelatin hardener when the polymer contains no cross-linking groups. These elements are particularly useful in photographic products.
                            对于含有至少两个连续的含明胶层的元件,最上层的横向膨胀系数至少比下层含明胶层大 10%,通过在最上层中加入 1-90%(重量百分比)的
水溶性非扩散
乙烯基聚合物,可以减少因
水溶液膨胀而引起的网状结构、最上层还含有明胶硬化剂(当聚合物不含交联基团时)。这些元素在摄影产品中特别有用。